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China Split bobbin dual cavity pcb transformer Bel Fuse DST-3-120 providing power conversion and isolation for sale

Split bobbin dual cavity pcb transformer Bel Fuse DST-3-120 providing power conversion and isolation

Price Negotiable
Price: Negotiable
MOQ: Negotiable
Delivery Time: Negotiable
Product Description

Product Overview

The Signal ST/DST Series Split/Tran Specialty Purpose & Class 2 Transformers are designed for printed circuit board mounting, offering superior isolation and low capacitive coupling through a dual cavity platform. These transformers feature rigid pin construction for enhanced board insertion reliability. They are suitable for various applications requiring reliable power conversion with high isolation, including Class 2 applications.

Product Attributes

  • Brand: Signal Transformer (Belfuse)
  • Series: ST / DST Series Split/Tran
  • Construction: Split Bobbin with Dual Cavity Platform
  • Insulation System: Class F, 155 C
  • RoHS Compliant: Yes
  • Agency Certifications: UL 1446, UL Recognized 506 / UL 5085-1, 2, CSA certified to C22.2 #66.1, cCSAus certified to C22.2 #66.3 / UL 5085-3, UL Recognized UL5085-3 (Inherently Limited)
  • Customization: Custom versions available upon request.

Technical Specifications

Model VA Rating Primary Voltage (50/60 Hz) Secondary RMS Rating (Series) Secondary RMS Rating (Parallel) Dielectric Strength (Hipot) Pin Configuration Dimensions (L x W x H) Weight (lbs / kg)
ST-2-10 / DST-2-10 1.1 115 V / 115/230 V 10 VCT @ 0.11 A 5 V @ 0.22 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-10 / DST-3-10 2.4 115 V / 115/230 V 10 VCT @ 0.25 A 5 V @ 0.5 A 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-10 / DST-4-10 6 115 V / 115/230 V 10 VCT @ 0.6 A 5 V @ 1.2 A 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-10 / DST-5-10 12 115 V / 115/230 V 10 VCT @ 1.2 A 5 V @ 2.4 A 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-10 / DST-6-10 20 115 V / 115/230 V 10 VCT @ 2.0 A 5 V @ 4.0 A 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-10 / DST-7-10 36 115 V / 115/230 V 10 VCT @ 3.6 A 5 V @ 7.2 A 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-12 / DST-2-12 1.1 115 V / 115/230 V 12.6 VCT @ 0.09 A 6.3 V @ 0.18 A 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-12 / DST-3-12 2.4 115 V / 115/230 V 12.6 VCT @ 0.2 A 6.3 V @ 0.4 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-12 / DST-4-12 6 115 V / 115/230 V 12.6 VCT @ 0.5 A 6.3 V @ 1.0 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-12 / DST-5-12 12 115 V / 115/230 V 12.6 VCT @ 1.0 A 6.3 V @ 2.0 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-12 / DST-6-12 20 115 V / 115/230 V 12.6 VCT @ 1.6 A 6.3 V @ 3.2 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-12 / DST-7-12 36 115 V / 115/230 V 12.6 VCT @ 2.85 A 6.3 V @ 5.7 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-16 / DST-2-16 1.1 115 V / 115/230 V 16 VCT @ 0.07 A 8 V @ 0.14 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-16 / DST-3-16 2.4 115 V / 115/230 V 16 VCT @ 0.15 A 8 V @ 0.3 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-16 / DST-4-16 6 115 V / 115/230 V 16 VCT @ 0.4 A 8 V @ 0.8 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-16 / DST-5-16 12 115 V / 115/230 V 16 VCT @ 0.8 A 8 V @ 1.6 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-16 / DST-6-16 20 115 V / 115/230 V 16 VCT @ 1.25 A 8 V @ 2.5 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-16 / DST-7-16 36 115 V / 115/230 V 16 VCT @ 2.25 A 8 V @ 4.5 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-20 / DST-2-20 1.1 115 V / 115/230 V 20 VCT @ 0.055 A 10 V @ 0.11 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-20 / DST-3-20 2.4 115 V / 115/230 V 20 VCT @ 0.12 A 10 V @ 0.24 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-20 / DST-4-20 6 115 V / 115/230 V 20 VCT @ 0.3 A 10 V @ 0.6 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-20 / DST-5-20 12 115 V / 115/230 V 20 VCT @ 0.6 A 10 V @ 1.2 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-20 / DST-6-20 20 115 V / 115/230 V 20 VCT @ 1.0 A 10 V @ 2.0 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-20 / DST-7-20 36 115 V / 115/230 V 20 VCT @ 1.8 A 10 V @ 3.6 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-24 / DST-2-24 1.1 115 V / 115/230 V 24 VCT @ 0.045 A 12 V @ 0.09 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-24 / DST-3-24 2.4 115 V / 115/230 V 24 VCT @ 0.1 A 12 V @ 0.2 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-24 / DST-4-24 6 115 V / 115/230 V 24 VCT @ 0.25 A 12 V @ 0.5 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-24 / DST-5-24 12 115 V / 115/230 V 24 VCT @ 0.5 A 12 V @ 1.0 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-24 / DST-6-24 20 115 V / 115/230 V 24 VCT @ 0.8 A 12 V @ 1.6 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-24 / DST-7-24 36 115 V / 115/230 V 24 VCT @ 1.5 A 12 V @ 3.0 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-28 / DST-2-28 1.1 115 V / 115/230 V 28 VCT @ 0.04 A 14 V @ 0.08 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-28 / DST-3-28 2.4 115 V / 115/230 V 28 VCT @ 0.085 A 14 V @ 0.17 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-28 / DST-4-28 6 115 V / 115/230 V 28 VCT @ 0.2 A 14 V @ 0.4 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-28 / DST-5-28 12 115 V / 115/230 V 28 VCT @ 0.42 A 14 V @ 0.84 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-28 / DST-6-28 20 115 V / 115/230 V 28 VCT @ 0.7 A 14 V @ 1.4 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-28 / DST-7-28 36 115 V / 115/230 V 28 VCT @ 1.3 A 14 V @ 2.6 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-36 / DST-2-36 1.1 115 V / 115/230 V 36 VCT @ 0.03 A 18 V @ 0.06 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-36 / DST-3-36 2.4 115 V / 115/230 V 36 VCT @ 0.065 A 18 V @ 0.13 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-36 / DST-4-36 6 115 V / 115/230 V 36 VCT @ 0.17 A 18 V @ 0.34 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-36 / DST-5-36 12 115 V / 115/230 V 36 VCT @ 0.35 A 18 V @ 0.7 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-36 / DST-6-36 20 115 V / 115/230 V 36 VCT @ 0.55 A 18 V @ 1.1 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-36 / DST-7-36 36 115 V / 115/230 V 36 VCT @ 1.0 A 18 V @ 2.0 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-48 / DST-2-48 1.1 115 V / 115/230 V 48 VCT @ 0.023 A 24 V @ 0.046 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-48 / DST-3-48 2.4 115 V / 115/230 V 48 VCT @ 0.05 A 24 V @ 0.1 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-48 / DST-4-48 6 115 V / 115/230 V 48 VCT @ 0.125 A 24 V @ 0.25 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-48 / DST-5-48 12 115 V / 115/230 V 48 VCT @ 0.25 A 24 V @ 0.5 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-48 / DST-6-48 20 115 V / 115/230 V 48 VCT @ 0.4 A 24 V @ 0.8 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-48 / DST-7-48 36 115 V / 115/230 V 48 VCT @ 0.75 A 24 V @ 1.5 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-56 / DST-2-56 1.1 115 V / 115/230 V 56 VCT @ 0.02 A 28 V @ 0.04 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-56 / DST-3-56 2.4 115 V / 115/230 V 56 VCT @ 0.045 A 28 V @ 0.09 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-56 / DST-4-56 6 115 V / 115/230 V 56 VCT @ 0.11 A 28 V @ 0.22 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-56 / DST-5-56 12 115 V / 115/230 V 56 VCT @ 0.22 A 28 V @ 0.44 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-56 / DST-6-56 20 115 V / 115/230 V 56 VCT @ 0.35 A 28 V @ 0.7 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-56 / DST-7-56 36 115 V / 115/230 V 56 VCT @ 0.65 A 28 V @ 1.3 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)
ST-2-120 / DST-2-120 1.1 115 V / 115/230 V 120 VCT @ 0.01 A 60 V @ 0.02 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 0.97" (34.9 x 28.6 x 24.6 mm) 0.17 (0.08)
ST-3-120 / DST-3-120 2.4 115 V / 115/230 V 120 VCT @ 0.02 A 60 V @ 0.04 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.37" x 1.12" x 1.21" (34.9 x 28.6 x 30.8 mm) 0.25 (0.11)
ST-4-120 / DST-4-120 6 115 V / 115/230 V 120 VCT @ 0.05 A 60 V @ 0.1 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.62" x 1.31" x 1.31" (41.3 x 33.3 x 33.3 mm) 0.44 (0.20)
ST-5-120 / DST-5-120 12 115 V / 115/230 V 120 VCT @ 0.1 A 60 V @ 0.2 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 1.91" x 1.59" x 1.45" (48.4 x 40.4 x 36.9 mm) 0.70 (0.32)
ST-6-120 / DST-6-120 20 115 V / 115/230 V 120 VCT @ 0.16 A 60 V @ 0.32 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.25" x 1.88" x 1.45" (57.2 x 47.8 x 36.9 mm) 0.80 (0.36)
ST-7-120 / DST-7-120 36 115 V / 115/230 V 120 VCT @ 0.3 A 60 V @ 0.6 A 2500 Vrms 6 Pin (ST) / 8 Pin (DST) 2.62" x 2.18" x 1.59" (66.7 x 55.5 x 40.4 mm) 1.1 (0.50)

Note: Recommended secondary fuse values are indicated by numbers in parentheses next to the secondary ratings in the part number selection table. See Accessories datasheet for mounting screw information.


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Company Changsha Purple Horn E-Commerce Co., Ltd.
Location 2332 Kaibin Commercial Plaza, No. 419 Shaoshan Middle Road, Shazitang Street, Yuhua District, Changsha City, Hunan Province
Contact Person Sellina

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